"Invite" is a verb; whereas, "invitation" is a noun. The English language is becoming so informal that shortened forms are considered acceptable when they are not and anthimerias are ubiquitous.
Invite can be used as a noun:
The invite was hand written.
Thanks for your invite, I will see you tomorrow
verb or noun, depending on how you use it in a sentence. For example, invite in the sentence "Hey, I sent you an invite via email" would be a noun. Conversely, "I forgot to invite him to the party" is using invite as a verb :)
The word 'invite' is used informally as a noun; 'Did you send them an invite?'The abstract noun forms for the verb to invite are inviter (invitor), invitee, and invitation.
The word invited is a verb. It is the past tense of the verb invite.
The noun form for the verb 'invite' is invitation.
I want to invite you out for a drink. Were you invited to the wedding?
The verb to invite has no adverb form. The present participle of the verb, inviting, is a gerund (verbal noun) and an adjective. The past participle of the verb, invited, is an adjective. Another noun form is invitation (sometimes informally called an invite).
The word invitation is a noun. The plural noun is invitations.
The abstract noun form for the verb to invite are invitation and the gerund, inviting.
Abstract noun forms for the verb to invite are invitation and the gerund, inviting.
The noun forms of the verb to invite are invitee, invitation, and the gerund, inviting.
Forms of the verb to invite are inviting (gerund) and invitation (noun).A different word is the adjective invitiate, meaning not spoiled or corrupted.
The noun 'use' is a singular, common, abstract noun; a word for the purpose or utility of something; a word for a concept.